The controlled deposition of Cu2(ZnyFe1−y)SnS4, Cu2(ZnyFe1−y)SnSe4 and Cu2(ZnyFe1−y)Sn(SxSe1−x)4 thin films by AACVD: potential solar cell materials based on earth abundant elements†
Abstract
Highly crystalline thin films of Cu2(ZnyFe1−y)SnS4 (CZFTS), Cu2(ZnyFe1−y)SnSe4 (CZFTSe) and Cu2(ZnyFe1−y)Sn(SxSe1−x)4 (CZFTSSe) have been deposited by aerosol assisted chemical vapour deposition (AACVD) from mixtures of dithio- or diseleno-carbamato, diselenophosphinato and acetylacetenato complexes. The structure, morphology, composition, optical and electrical properties of the deposited materials were investigated. The [Zn] : [Fe] and [S] : [Se] ratios are the important factors affecting the overall properties of these materials and can be controlled.